djs-simplecmd/index.js

A simple command parser for discord.js

class CommandParser {
  constructor(options) {
    this.options = options
    if (!options.prefix || options.prefix === "" || typeof options.prefix !== "string") {
      throw new Error("Prefix must be defined and must be a string and cannot be an empty string.")
    }
    this.commands = options.commands || []
    this.prefix = options.prefix
    this.talkedRecently = new Set();
  }
  parse(message) {
    var messageArray = message.content.split(" ")
    var args = messageArray.slice(1)
    var command = messageArray[0]
    if (this.commands.map(r=> this.prefix + r.name).includes(command)) {
      var commandObject = this.commands.filter(r=> r.name == command.split('').slice(this.prefix.length).join(''))[0]
      if (commandObject.cooldown) {
        if (this.talkedRecently.has(message.author.id)) {
          message.reply("Please wait "  + (commandObject.cooldown / 1000) + " seconds before using this command again.")
          return
        } else {}
      }
      if (!commandObject.arguments) commandObject.arguments = []
      if (args.length === 0 && commandObject.arguments.length !== 0 && !commandObject.noArgumentRule) {
        message.channel.send("Correct Usage: " + this.prefix + commandObject.name + " " + commandObject.arguments.map(r=> "[" + r + "]").join(' ') + "\nDescription: " + commandObject.description || "None")
        return
      }
      if (args.length !== commandObject.arguments.length && !commandObject.noStrictArgumentRule && !commandObject.noArgumentRule) {
        message.channel.send("Correct Usage: " + this.prefix + commandObject.name + " " + commandObject.arguments.map(r=> "[" + r + "]").join(' ') + "\nDescription: " + commandObject.description || "None")
        return
      } else {
        var returns = commandObject.function ? commandObject.function(message, args) : undefined
        if (!returns) {
          if (commandObject.noReturn) {
            if (commandObject.cooldown) {
              this.talkedRecently.add(message.author.id)
              setTimeout(() => {
                this.talkedRecently.delete(message.author.id);
              }, commandObject.cooldown);
            }
            return
          }
          if (!commandObject.defaultResponse) {
            throw new Error("No default response specified|is null and function returned undefined|null.")
          } else {
            message.channel.send(commandObject.defaultResponse)
            return
          }
        } else {
          if (commandObject.cooldown) {
            this.talkedRecently.add(message.author.id)
            setTimeout(() => {
                this.talkedRecently.delete(message.author.id);
            }, commandObject.cooldown);
          }
          if (returns.embed && returns.text) {
            message.channel.send(returns.text, {embed: returns.embed})
            return
          } else if (returns.embed) {
            var embed = returns.embed
            message.channel.send({embed})
            return
          } else {
            message.channel.send(returns.text)
          }
        }
      }
    }
  }
  addCommand(command) {
    if (command.name && (command.function || command.defaultResponse)) {
      this.commands.push(command)
    } else {
      throw new Error("Command must have a name and either a function or a default response.")
    }
  }
  setPrefix(prefix) {
    if (!prefix || prefix === "" || typeof prefix !== "string") {
      throw new Error("Prefix must be defined and must be a string and cannot be an empty string.")
    this.prefix = prefix
    this.options.prefix = prefix
  }
}
function attach(bot, options) {
  bot.on("message", (message) => {
    if (!message.guild.parser) {
      message.guild.parser = new CommandParser(options)
    }
    message.guild.parser.parse(message)
  })
}
module.exports.CommandParser = CommandParser
module.exports.attach = attach